发明名称 |
Percussion device with a control valve for two alternately striking pistons |
摘要 |
The invention relates to a percussion device comprising two percussion pistons alternately making a percussion motion and a control valve for controlling the percussion pistons. The control valve (7) comprises a slide (8) affected by a force so that the slide is generally in a first position, but moves at the end of the percussion motion of the first percussion piston from the first position to a second position and correspondingly back to the first position at the end of the percussion motion of the second percussion piston (4).
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申请公布号 |
US7464635(B2) |
申请公布日期 |
2008.12.16 |
申请号 |
US20040840640 |
申请日期 |
2004.05.07 |
申请人 |
SANDVIK MINING AND CONSTRUCTION OY |
发明人 |
RANTALA ESA;HEINONEN JARMO;KOSKIMAEKI ANTTI |
分类号 |
F01L25/04;B25D9/18;F01L25/08 |
主分类号 |
F01L25/04 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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